Phonograph-reproducer.



T. A. EDISON. PHONOGRAPH REPRODUGER.

APPLICATION FILED 001. 28, 1909;

1,052,656, Patented Feb. 11, 1913.

rJNrrEn STATES PATENT canton.

THOMAS A. EDISON, or LLEWELII'VYINYPARK, wEsT ORANGE, NEW JERSEY, ASSIGNOR T0 THOMAS A. EmsoN, INcoRPon TED, or WEST ORANGE, NEW JERSEY, ,A CORPORA- TIQN on NEW JERSEY.

r'noNoGE gPH-nErnonucER.

To all whom may concern: 1 Be it "known that I, THo A's' A. *EoIsoN, a citizen of the United States, and aresident county, New Jersey, have invented certain new and useful Improvements in Phonograph-Reproducers, of which the following is a description.

' My invention relates to-phonograph reproducers and 'has for .its object the pro vision of means whereby the stylus lever may have greater freedom of movement in.

tracking the grooves of the'sound record, and particularly in movements transverse to the record groove.

While great facility of movement of the stylus lever both in adirection parallel to and transverse to therecord groove is important for "reproduction from any sound record of the hill and valley type, it is particularly important in the case of a record having 200 threads or. a greater number of threads per inch, owing to the thin walls between the record grooves which might bev broken down or jumped across by a stylus, the parts moving with which have consider- V able inertia.

In phonograph reproducers as commonly constructed, any movement of the stylus lever transverse tothe record groove moves or twists the link connecting the stylus lever to the diaphragm, and a certain amount of inertia of this link must be overcome during the movement. I overcome this ditlicultv in my ,present invention by pivotally connecting the stylus lever to a. floating weightwhich is pivotally connected to "the sound box body, the pivotal connection therefor being in the same plane at right angles to the diaphragm as'the link connecting the stylus lever to the diaphragm. By this means the floating weight, which is mounted to have a limited movement transverse to the record groove, may so move transversely Figure 1 is a central vertical section Specification of Letters Patent. Patented Feb. 11, 1913. Application filed octob fas, 1909. Serial No. 525,063.

through a reproducer equipped with my in- Vent-ion, certain parts being shown in side elevation. Fig. 2' is a bottom plan view thereof. Y

Referring to'the drawings. the usual. sound'box 1 is provided with" diaphragm 2,

which is clamped between gaskets 3, the

whole being hel-din place by ring 4, which is threaded within flange 5 of sound box 1 in the usual manner. A bridging member 6 is secured to the bottom of flange 5 of the reproducer in such a manner. as to extend diametrically across the same as shown. A cylindrical memb'er 7 screw threaded on its periphery, as shown at 8, and having an annular flange 9 at its upper end, is threaded through a suitable opening for the same in member 6, so that cylindrical member 7 is axially in al'inement with the center of diaphragm 2. Member 7 is provided with lugs 10 and 11 on opposite sides at its lower end,

otally connected by screws 13, which extend through lugs or ears-14 formed on the float ing weight 12, and into the lugs 10, 11 on member 7, the lugs on the floating weight being 'so formed as to embrace member 7 and come closely adjacent to lugs 10,-11 on mem-- her 7. Screws 13 are thus placed in a plane which is substantially in alinement withthe center, or axis of diaphragm 2. Stylus lever 15 bearing stylus 16 is pivotally connected to floating weight 12 by means of pivot pin 17, which is supported in cars 18 depending from floating weight 12 or in any other convenient manner. Cylindrical member 7 is provided with a passageway. 19 which extends axially through the same. Link 20 connecting the center of diaphragm to the 'tail of stylus lever 15 is extended through this passageway, being positioned substantially in the same plane as pivots 13 of the Having now described my invention, what, I -claim and desire to protect by Letters Patent' is as follows:

1. In a phonograph reproducer, the combination with the sound box, of vibratory means therein, a stylus lever, a member rotatably supported from said sound box cen trally thereof and having a passageway therethrough, a link extendingthrough said passageway and connecting said lever to said means, a floating weight, pivot means for said lever carried by said weight, and

. means pivotally supporting said weight from said member, substantially as described. I

2. In a phonograph reproducer, the coin-v bination with the sound box, of vibratorymeans therein, a stylus lever, .a cylindrical member rotatably supported from said sound box centrally thereof and having a passageway axially therethrough, a link extending through said passageway and connecting said lever-to said means, afloating weight, pivot means for said lever -carried by said weight, said weight being provided with lugs embracing said cylindrical mem-' her, and pivot means for said weight extending through said lugs into said member,

substantially as described.

3. In a phonograph reproducer, the combination with the sound box, of vibratory means therein, a stylus. lever, a bridging member secured to the face of .said sound passageway-axially 'therethrough, a link extendlng through said passageway and connecting-said lever to said means,.a floating vbox, a cylindricalniember rotatably mounta red in said bridging member and having a weight, pivot means for said lever carriedby said weight, said weight being providedwithlugs embracing said cylindrical meinher, and pivot means for weight extending through said lugs into saidmember,

substantially as described.

4 In a phonograph 'reproducer, .the com bination with the sound box, ,ofvibratory means therein, a stylus lever, aamember rotatably supported from said sound box and having a passageway,therethrough, a link extending through"a id passageway and connecting said lever to saidmeans,' a floating weight, pivot .means,for said lever care 'ried' by said weight,v and means pivotally.

supporting said weight from said member Witnesses: DYER SMITH, JOHN M.-CANFIELD.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner 0': Patents, Washington, D. C.

THOS. A. un son. I 

